FCFS Scheduling is a non-preemptive algorithm, meaning once a process starts running, it cannot be stopped until it voluntarily relinquishes the CPU, typically when it terminates or performs I/O.
algorithm. FCFS stands for First Come First Serve A real-life example of the FCFS method is buying a movie ticket on the ticket counter. It is the simplest form of a CPU scheduling algorithm It is a Non-Preemptive CPU scheduling algorithm, so after the process has been allocated to the CPU, it will never release the CPU until it finishes executing.
Salient Features of FCFS Algorithm FCFS is a non-preemptive scheduling algorithm. The process that arrives in the ready queue first is allocated to execute in the CPU first. Implementation is easy since it does not involve any complex algorithm. It does not require any prior knowledge about the processes. Also, if the run time behaviour of the processes changes dynamically, there is no impact ...
Operating systems use different scheduling algorithms to schedule the execution of processes by the CPU. Some scheduling algorithms are as follows: First-come, first-served (FCFS) scheduling Shortest-job-next (SJN) scheduling Priority scheduling Shortest remaining time Round robin (RR) scheduling Multiple-level queues scheduling Note: Algorithms are either preemptive or non-preemptive. In this ...
Learn FCFS (First-Come-First-Serve) scheduling algorithm with simple explanation and 21 practice questions. Boost your OS exam preparation at CS Vidyalaya.
First Come First Serve (FCFS) Scheduling: A Beginner's Guide The Knowledge Academy 07 February 2026 Interested in understanding First Come First Serve? It’s a method of prioritisation where tasks or services are handled in the order they arrive and is useful across domains. In this blog, we’ll dive into the applications, benefits, and challenges of First Come First Serve across different ...